/Engine/Source/Runtime/TypedElementFramework/Public/Elements/Framework/TypedElementList.h
Access the interface to allow external systems (such asUSelection) to receive immediate sync notifications as an element list is changed. This exists purely as a bridging mechanism and shouldn't be relied on for new code. It is lazily created as needed.
[FLegacySync](API\Runtime\TypedElementFramework\Elements\Framework\TTypedElementList\FLegacySync) & Legacy_GetSync()